[FFmpeg-cvslog] avcodec/jpeglsdec: check err value for ls_get_code_runterm()

[Michael Niedermayer]

ffmpeg | branch: release/2.0 | Michael Niedermayer <michaelni at gmx.at> | Wed Oct 30 23:27:28 2013 +0100| [bdf6e6fff41ba90528aa6452ea0621dfaa4d78a1] | committer: Michael Niedermayer

avcodec/jpeglsdec: check err value for ls_get_code_runterm()

Fixes infinite loop
Fixes Ticket3086

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit cc0e47b55096361723b364afa43b79a3f5619cdc)

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=bdf6e6fff41ba90528aa6452ea0621dfaa4d78a1
---

 libavcodec/jpeglsdec.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavcodec/jpeglsdec.c b/libavcodec/jpeglsdec.c
index 3af230d..894dd42 100644
--- a/libavcodec/jpeglsdec.c
+++ b/libavcodec/jpeglsdec.c
@@ -148,6 +148,8 @@ static inline int ls_get_code_runterm(GetBitContext *gb, JLSState *state,
         ret = ret >> 1;
     }
 
+    if(FFABS(ret) > 0xFFFF)
+        return -0x10000;
     /* update state */
     state->A[Q] += FFABS(ret) - RItype;
     ret         *= state->twonear;